[....] Starting periodic command scheduler: cron[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Starting mcstransd: [....] Starting file context maintaining daemon: restorecond[?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. [....] Starting OpenBSD Secure Shell server: sshd[ 10.497050] random: sshd: uninitialized urandom read (32 bytes read) [?25l[?1c7[1G[[32m ok [39;49m8[?25h[?0c. Debian GNU/Linux 7 syzkaller ttyS0 syzkaller login: [ 16.418379] random: sshd: uninitialized urandom read (32 bytes read) [ 16.460822] random: crng init done Warning: Permanently added '10.128.15.205' (ECDSA) to the list of known hosts. executing program [ 23.095668] ------------[ cut here ]------------ [ 23.100490] WARNING: CPU: 1 PID: 2045 at mm/page_alloc.c:3556 __alloc_pages_nodemask+0x13a0/0x1bd0 [ 23.109623] Kernel panic - not syncing: panic_on_warn set ... [ 23.109623] [ 23.117025] CPU: 1 PID: 2045 Comm: syz-executor123 Not tainted 4.9.125+ #89 [ 23.124104] ffff8801cf31f6f8 ffffffff81af0ae9 ffffffff82838ba0 00000000ffffffff [ 23.132119] 0000000000000000 0000000000000001 0000000000000de4 ffff8801cf31f7b8 [ 23.140112] ffffffff813df095 0000000041b58ab3 ffffffff82c28773 ffffffff813deed6 [ 23.148108] Call Trace: [ 23.150679] [] dump_stack+0xc1/0x128 [ 23.156023] [] panic+0x1bf/0x39f [ 23.161018] [] ? add_taint.cold.6+0x16/0x16 [ 23.166967] [] ? get_page_from_freelist+0x702/0x18e0 [ 23.173696] [] ? __warn.cold.9+0xa6/0x17f [ 23.179472] [] ? __alloc_pages_nodemask+0x13a0/0x1bd0 [ 23.186287] [] __warn.cold.9+0xc1/0x17f [ 23.191898] [] warn_slowpath_null+0x2c/0x40 [ 23.197849] [] __alloc_pages_nodemask+0x13a0/0x1bd0 [ 23.204494] [] ? trace_hardirqs_on+0x10/0x10 [ 23.210531] [] ? trace_hardirqs_on+0x10/0x10 [ 23.216569] [] ? _raw_spin_unlock_irqrestore+0x5f/0x70 [ 23.223474] [] ? gfp_pfmemalloc_allowed+0x110/0x110 [ 23.230116] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 23.236863] [] ? debug_lockdep_rcu_enabled+0x77/0x90 [ 23.243593] [] ? update_stack_state.constprop.2+0x7c/0x170 [ 23.250845] [] kmalloc_order+0x2a/0x70 [ 23.256357] [] kmalloc_order_trace+0x1f/0x190 [ 23.262481] [] __kmalloc+0x1ae/0x310 [ 23.267826] [] ? __lock_acquire+0x654/0x4a10 [ 23.273864] [] vga_arb_write+0xd8/0xcc0 [ 23.279466] [] ? kasan_slab_free+0x119/0x190 [ 23.285527] [] ? vga_str_to_iostate.isra.3+0x130/0x130 [ 23.292435] [] ? trace_hardirqs_on+0x10/0x10 [ 23.298471] [] ? trace_hardirqs_on+0x10/0x10 [ 23.304532] [] ? _raw_spin_unlock_irqrestore+0x5a/0x70 [ 23.311440] [] __vfs_write+0x115/0x580 [ 23.316979] [] ? vga_str_to_iostate.isra.3+0x130/0x130 [ 23.323908] [] ? __vfs_read+0x560/0x560 [ 23.329517] [] ? __might_sleep+0x95/0x1a0 [ 23.335294] [] ? __inode_security_revalidate+0xd9/0x130 [ 23.342289] [] ? avc_policy_seqno+0x9/0x20 [ 23.348152] [] ? selinux_file_permission+0x82/0x470 [ 23.354796] [] ? security_file_permission+0x8f/0x1e0 [ 23.361539] [] ? rw_verify_area+0xe5/0x2a0 [ 23.367402] [] vfs_write+0x187/0x520 [ 23.372743] [] SyS_write+0xd9/0x1c0 [ 23.377996] [] ? SyS_read+0x1c0/0x1c0 [ 23.383426] [] ? do_syscall_64+0x48/0x480 [ 23.389225] [] ? SyS_read+0x1c0/0x1c0 [ 23.394664] [] do_syscall_64+0x19f/0x480 [ 23.400356] [] entry_SYSCALL_64_after_swapgs+0x5d/0xdb [ 23.407625] Dumping ftrace buffer: [ 23.411223] (ftrace buffer empty) [ 23.414919] Kernel Offset: disabled [ 23.418523] Rebooting in 86400 seconds..